Wildemuth chapter 12
variables are manipulated and their effects upon other variables observed – basic definition provides a strong framework for understanding primary characteristics of a to experiment
1st some variables called independent variables are manipulated – you must exert control over their variation to be sure you can understand the effects of their understudy
independent variables are the input to the experiment
2nd of their those effects and other variables (call dependent variables) the dependent variable understood as the output from the experiment
characterized by control – all possibilities for variation are either controlled or they are varied systematically
three experimental designs
pretest protest control group design
posttest only control group design
factorial design
Randomization
the validity of your experiment – threats to internal validity
threats to external validity
Additional issues
experimental setting: lab or field
within versus between subjects designs
ethical issues in experiments
Principles of experimentation are simple: randomly's assigned the subjects to two or more groups and measure the outcomes resulting from the activation experienced age group
move beyond the basic characteristics of peer experiments you find their number of decisions to make about design
crucial that you understand your research question thoroughly and stated clearly
identify which independent variable should be manipulated and which dependency variables should be measured
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